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Problem
Pump will not start
Fault condition
Motor brushes worn to end of life
Pendant does not function
Pump in local mode
Pendant damage
Motor stops under load
Low voltage
Electric valve will not
No power or wrong voltage
operate
Solenoid cable disconnected or damaged
Valve out of adjustment
Pump fails to build
Low oil level
pressure or less than full
Relief valve set too low
pressure
External system leak
Internal leak in pump
Internal leak in valve
Internal leak in system component
Pump builds full pressure,
Load greater than cylinder capacity at full pressure
but load does not move
Flow to cylinder blocked
Cylinder drifts back on its
External system leak
own
Internal leak in a system component
Non-load holding valve used
No load on a "load return" cylinder
Single-acting cylinder will
Return flow restricted or blocked
not return
Locking valve used (VM33L)
Valve malfunction
Cylinder return spring broken
Double-acting cylinder will
Return flow restricted or blocked
not return
Locking valve used
Valve malfunction
Pump runs hot
Advance or retract flow restricted
High ambient temperature
Pump pressure goes
Cylinder comes to a sudden stop (i.e., strokes out)
above "SET PRESS" or
"HI PRESS" value
After boot-up LCD shows
Pressure switch circuit is open and press transducer
"P switch open"
is installed
LCD display shows
Lose jumper on power board
"FILTER"
AUTOMODE does not
Pressure transducer installed in pressure port other
work correctly with VE33
than "GA"
or VE43 valves
* For LCD versions, also see sections 6.2 Fault Conditions, 6.3 Warning Conditions and 6.4 LCD Menus.
Trouble-shooting Guide
Possible Cause
13
Action*
See section 5.0 Operation and 6.2 Fault Conditions for details.
See Section 7.4, Motor Brush Replacement.
See Section 6.4H, Local Menu.
See Section 6.4J, Diagnose Menu.
See authorized service center.
See Section 6.2B and 6.3A.
Turn off other electric loads.
Use heavier gauge extension cord.
Connect to correct power source per pump name plate.
Connect, repair, or replace cable.
See authorized service center.
Add oil per section 4.4.
Adjust per section 5.9 Inspect and repair or replace.
See authorized service center. See authorized service center.
See authorized service center.
Reduce load or add cylinder capacity.
Check hydraulic couplers for full engagement.
Inspect all hydraulic connections and replace or repair.
See authorized service center.
See authorized service center.
Add load.
Check couplers for full engagement.
Turn the pump off after the valve is put into the retract position.
See authorized service center.
See authorized service center.
Check couplers for full engagement.
Run motor while retracting.
See authorized service center.
Check couplers for full engagement.
Install heat exchanger for hydraulic oil.
Set user adjustable relief valve 200 psi above "SET PRES" or "HI
PRESS" valve to redirect excess oil flow.
Check power board pressure switch jumper for being lose or
missing (see Fig. 12).
Remove pressure switch or pressure transducer from pump.
Check power board for lose or missing jumper at filter (see fig.
12).
Move pressure transducer to "GA" (see section 8.1).
Change microprocessor setting to "B" (see Authorized
Service Center.
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